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Bandpass and notch filter
6V6 6J5 Class A Vacuum Tube (Valve) Amplifier Circuit
No-bias L-C High-Frequency Oscillator
nicd battery charger schematic
M-88L70 3V DTMF Receiver
Infrared detector circuit using PID20
1W LED Driver
Gated Alarm
pyro rf transmitter 27mhz
Actuator circuit
Amazing All-Band Receiver
Effective Load Resistance
Constitute a CMOS circuit time adjustment of a spot welder